diff --git a/.travis.yml b/.travis.yml
index 2e14d6f..f12760a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,7 @@ otp_release:
 install: mix deps.get
 before_install:
   - mkdir -p vendor/elixir
-  - wget -q https://github.com/elixir-lang/elixir/releases/download/v0.13.1/Precompiled.zip && unzip -qq Precompiled.zip -d vendor/elixir
+  - wget -q https://github.com/elixir-lang/elixir/releases/download/v0.13.3/Precompiled.zip && unzip -qq Precompiled.zip -d vendor/elixir
   - export PATH="$PATH:$PWD/vendor/elixir/bin"
   - export MIX_ENV=test
   - mix local.hex --force
diff --git a/lib/httpoison.ex b/lib/httpoison.ex
index add03d1..dec5d04 100644
--- a/lib/httpoison.ex
+++ b/lib/httpoison.ex
@@ -82,7 +82,7 @@ defmodule HTTPoison.Base do
            {:ok, id} ->
              %HTTPoison.AsyncResponse { id: id }
            {:error, reason} ->
-             raise HTTPoison.HTTPError[message: to_string(reason)]
+             raise HTTPoison.HTTPError, message: to_string(reason)
          end
       end
 
diff --git a/mix.exs b/mix.exs
index 6e16a73..9039f9e 100644
--- a/mix.exs
+++ b/mix.exs
@@ -8,7 +8,7 @@ defmodule HTTPoison.Mixfile do
   def project do
     [ app: :httpoison,
       version: "0.1.1",
-      elixir: "~> 0.13.1",
+      elixir: "~> 0.13.3",
       name: "HTTPoison",
       description: @description,
       package: package,
diff --git a/test/httpoison_test.exs b/test/httpoison_test.exs
index fee54dd..76dadb9 100644
--- a/test/httpoison_test.exs
+++ b/test/httpoison_test.exs
@@ -4,6 +4,7 @@ defmodule HTTPoisonTest do
 
   setup_all do
     {:ok, _} = :application.ensure_all_started(:httparrot)
+    :ok
   end
 
   test "get" do